Ghani Usman, Zamin Bakht, Tariq Bashir Muhammad, Ahmad Mahmood, Sabri Mohanad Muayad Sabri, Keawsawasvong Suraparb
Department of Engineering, Ed.8, University of Palermo, Viale Delle Scienze, 90128 Palermo, Italy.
Department of Civil Engineering, CECOS University of IT & Emerging Sciences, Peshawar 25000, Pakistan.
Polymers (Basel). 2022 Sep 4;14(17):3673. doi: 10.3390/polym14173673.
This research is aimed at investigating the mechanical behavior of the bitumen by the addition of high-density polyethylene (HDPE) and low-density polyethylene (LDPE) obtained from waste plastic bottles and bags. Polymers (HDPE and LDPE) with percentages of 0%, 2%, 4%, and 6% in shredded form by weight of bitumen were used to evaluate the spectroscopic, structural, morphological, and rheological properties of polymer-modified binders. The rheological properties for different factors; viscosity (ἠ) from Rotational Viscometer (RV), rutting factor G*/Sin (δ), fatigue characteristics G*. Sin (δ), for the modified binder from dynamic shear rheometer (DSR), Short and long-term aging from rolling thin film oven (RTFO), and pressure aging vessel (PAV) was determined. The thermal characteristics, grain size, and texture of polymers for both LDPE and HDPE were found using bending beam rheometer (BBR) and X-ray diffraction (XRD), respectively. Fourier transform infrared (FTIR) analysis revealed the presence of polymer contents in the modified binder. Scanning electron microscopy (SEM) images revealed the presence of HDPE and LDPE particles on the surface of the binder. Creep Rate (m) and Stiffness (S) analysis in relationship with temperature showed a deduction in stress rate relaxation. Results have revealed the best rutting resistance for 6% HDPE. It also showed an improvement of 95.27% in G*/Sin (δ) which increased the performance of the bituminous mix. Similarly, the addition of 4% LDPE resulted in maximum dynamic viscosity irrespective of the temperatures. Moreover, fatigue resistance has shown a significant change with the HDPE and LDPE. The festinating features of waste plastic modified binder make it important to be used in the new construction of roads to address the high viscosity and mixing problems produced by plastic waste and to improve the performance of flexible pavements all over the world.
本研究旨在通过添加从废塑料瓶和塑料袋中获得的高密度聚乙烯（HDPE）和低密度聚乙烯（LDPE）来研究沥青的力学性能。使用按沥青重量计分别为0%、2%、4%和6%的切碎形式的聚合物（HDPE和LDPE）来评估聚合物改性粘结剂的光谱、结构、形态和流变性能。测定了不同因素下的流变性能；旋转粘度计（RV）测得的粘度（η）、动态剪切流变仪（DSR）测得的改性粘结剂的车辙因子G*/Sin(δ)、疲劳特性G*.Sin(δ)，以及旋转薄膜烘箱（RTFO）和压力老化容器（PAV）进行的短期和长期老化。分别使用弯曲梁流变仪（BBR）和X射线衍射（XRD）测定了LDPE和HDPE聚合物的热特性、粒度和纹理。傅里叶变换红外（FTIR）分析揭示了改性粘结剂中聚合物成分的存在。扫描电子显微镜（SEM）图像显示粘结剂表面存在HDPE和LDPE颗粒。与温度相关的蠕变率（m）和刚度（S）分析表明应力率松弛有所降低。结果表明6%的HDPE具有最佳的抗车辙性能。它还使G*/Sin(δ)提高了95.27%，从而提高了沥青混合料的性能。同样，添加4%的LDPE无论温度如何都能产生最大动态粘度。此外，HDPE和LDPE使抗疲劳性发生了显著变化。废塑料改性粘结剂的这些特性使其对于用于道路新建工程非常重要，以解决塑料废物产生的高粘度和混合问题，并改善世界各地柔性路面的性能。
